Chapter 21 Questions Flashcards
(21 cards)
The third, specific line of defense includes white blood cells called _______.
Lymphocytes
Substances found on invading organisms that trigger an immune response are called ______.
Antigens
A mother passing antibodies to her baby through breast milk is a type of _______ immunity.
Passive
B cells develop in the ____, and T cells reside in the _______.
Bone
Thymus
Immune Cells that help bolster an immune response are called _____ T cells.
Helper
The skin and mucous membrane secretions are _________ defenses that make up the _____ line of defense against infection.
nonspecific
first
The _________ line of defense consists of ______ internal defenses, including white blood cells such as phagocytic macrophages, which engulf and digest foreign cells, and natural killer cells, which release chemicals that disintegrate cell membranes of tumor cells and virus-infected cells.
Second
Nonspecific
_______ attracts phagocytes and promotes tissue healing.
Inflammation
________ proteins, including interferon, help protect uninfected cells from becoming infected.
Defensive
_______ proteins coat microbes and make them easier for macrophages to ingest.
Complement
Lymphocytes are part of the third and specific line of defense in response to antigens on the surface of pathogens.
True
Exposure to _______ causes increased production of B and T lymphocytes.
Antigens
B cells secrete antibodies against pathogens and T cells attack invades
True
How do bodily secretions help protect against infections?
They can help remove infectious organisms from the body
_________ produce receptors that are found on cell surfaces or secreted as antibodies and destroy invaders.
_________also reproduce receptors but not ones that are secreted.
B cells
T cells
Binary Fission
A. Allows bacterial cells to produce more plasmids
B. Allows immune cells to replicate
C. Is the method by which bacteria replicate
C. Is the method by which bacteria replicate
Viral Replication
A. occurs only inside living cells
B. requires that copies of the viral genome be produced
C. requires the copies of the viral proteins be synthesized
D. all of the above
D. All of the above
Autoimmune diseases result when
When the immune system fails to differentiate between self and non self cells
Which of the following cell types divides to produce cells that make antibodies?
A. helper T cells
B. B cells
C. All of the above
B. B cells
___________cells boost immune system response
Helper T
Your immune system can recognize a virus you have been exposed to once because a cell that makes receptors to a virus multiplies on exposure to it and produces memory cells.
True
